The imperfections bring you closer to live. Why do bands tune? Because acoustic instruments are pray to forces of nature.

Beyond the physical mechanics of the instrument, the techniques of the human come into play. Some purposeful, some not.

The manufactures are on the right track. However, they have limitation of resources (computing power, programming techniques, and finite R&D budgets). They have made great strides in the past few years. Rhodes and Pianos sound great. Some instruments have more nuances that are more difficult to capture (string instruments). With each new version, they get a little closer.

It appears that the approach is to first accurately reproduce the sound without sounding too synthy and then add back the nuances and imperfections that makes it real.

Hang in there. It will keep getting better.

The challenge for us as musicians is how to best use the canvas of sounds available to us. Don't be frustrated in limitations that you perceive. Instead, rejoice in what you have.